I am planning on pre-ordering an iPhone from Apple. I was wondering if I use my debit card to purchase my iPhone; thereafter will the monthly bills from ATT be on my debit card or will ATT continue to charge the old credit card on file (in this case, my debit card to pre-order and my moms credit card that's been paying the bills to ATT).

I want to know since I'm a broke college student that wants the new iPhone but, I'd rather have my mom continue paying the monthly bills.

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